Orange Circuit: Colorsound Power Boost Cloning Multi-band Gain Shaping: The VOL knob uses a special inverted potentiometer for precise gain adjustment, ranging from clean, clean boosts to vintage fazed overdrive. Flexible EQ: Independent BASS (low frequency) and TREBLE (high frequency) controls allow for fine-tuning of the tonal profile. Dual Voltage Analog: PWR/DRR switching allows for simulating the powerful drive of the original 18V version or the gentle overdrive characteristics of the 9V version. Master Volume Control: Equipped with a MASTER master volume knob for easy matching of output levels. (Important Power Warning) A linear power supply must be used; 9V DC is recommended, with the inner side negative and the outer side positive. Absolutely do not use voltages exceeding 9.7V! The maximum voltage must not exceed 9.7V; otherwise, it will cause permanent damage to the equipment, and you will be solely responsible! II. White Circuit: HIWATT Amplifier Analog Full Dynamic Range: The VOLUME knob provides a seamless transition from full, high-headroom clean sound to powerful British overdrive and distortion. Color: Green Material: Aluminum Alloy Package Contents: 1*Effects Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.